JP2013206816A - Power supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply device that can be used with safety even after submergence.SOLUTION: A power supply device 1 has a waterproof case and a fixing member 2. The waterproof case has a housing case 11 and a lid 12, and satisfies a predetermined waterproof standard when the lid 12 is closed. A battery 3 is housed in the waterproof case. The fixing member 2 is used for fixing the battery 3 in the housing case 11. The battery 3 is fixed to a bottom plate 22 of the fixing member 2. Side plates 23 and 24 are opposed to each other, and extend upward from edges of the bottom plate 22. A top plate 20 is put on the side plates 23 and 24. Since the top plate 20 is formed to be matched with an opening of the housing case 11, when the fixing member 2 is housed in the housing case 11, the circumferential edge of the top plate 20 contacts with an inner wall of the housing case 11. Thereby, because horizontal movement of the top plate 20 is suppressed, horizontal movement of the fixing member 2 in the housing case 11 is suppressed.

Description

  The present invention relates to a power supply device that can be used as an emergency power supply.

  In preparation for a power outage caused by a disaster, local governments and hospitals have emergency power supplies in advance. For example, a diesel generator is used as an emergency power source. The diesel generator can stably supply relatively large electric power by continuing to supply fuel. However, the diesel generator has problems such as noise and exhaust gas.

  Patent Document 1 discloses an emergency power supply system using a solar cell array. The emergency power supply system according to Patent Document 1 holds a solar cell array in an inclined manner, and connects the solar cell array to a power supply device. Thereby, electric equipments, such as illumination and a personal computer (PC), can be used. In the emergency power supply system according to Patent Document 1, the solar cell array can be folded, so that space saving at the time of storage is realized and transportation is easy.

JP 2006-73606 A

  The above-described emergency power system is normally stored in a warehouse or the like. However, when the storage location is flooded due to flooding or the like, the user cannot use the emergency power supply after flooding.

  In view of the above problems, an object of the present invention is to provide a power supply device that can be used safely even after being submerged.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a power supply device, comprising a secondary battery, a fixing member to which the secondary battery is fixed, a lid, and a storage case for storing the fixing member. A waterproof case that satisfies a predetermined waterproof standard by closing the opening of the storage case, and the fixing member extends upward from the bottom plate to which the secondary battery is attached. The first side plate opposes the second side plate from the first side plate, the second side plate extending upward from the bottom plate and facing the first side plate, and the upper end of the first side plate. A first support plate extending in a direction opposite to the direction, and a second support plate extending from the upper end of the second side plate in a direction opposite to the direction in which the second side plate faces the first side plate. When the fixing member is stored in the storage case The bottom plate is opposed to the bottom surface of the inside of the housing case, the first support plate and the second supporting plate is in contact with the inner wall of the housing case.

  The invention according to claim 2 is the power supply device according to claim 1, wherein the first support plate and the second support plate are integrally formed top plates, and the top plate is The first side plate and the second side plate are mounted on upper ends of the first side plate and the second side plate.

  Invention of Claim 3 is a power supply device of Claim 1 or Claim 2, Comprising: Furthermore, it attaches to the back surface of the said lid | cover, and when the said lid | cover closes the opening of the said storage case, the said top plate A deterrent member that contacts the upper surface.

  The invention according to claim 4 is the power supply device according to claim 2 or 3, further comprising an impact absorbing member provided at a peripheral edge of the top plate, wherein the fixing member is stored in the storage case. When done, the shock absorbing member contacts the inner wall of the storage case.

  A fifth aspect of the present invention is the power supply apparatus according to any one of the second to fourth aspects, further comprising a hole penetrating the top plate in the vertical direction.

  6. The power supply device according to claim 1, wherein the power supply device is further mounted on a bottom surface inside the storage case and parallel to the bottom surface inside the storage case. A restoring member having a restoring force with respect to a direction, and the bottom plate is placed on the restoring member when the fixing member is stored in the storage case.

  In the power supply device according to the present invention, the secondary battery includes a lid and a storage case, and is stored in a waterproof case that satisfies a predetermined waterproof standard. Since the water does not enter the inside of the waterproof case when the power supply device is submerged, the user can safely use the power supply device after the submersion.

  A secondary battery is attached to the bottom plate of the fixing member, and the first side plate and the second side plate extend upward from the bottom plate and face each other. The first support plate extends from the upper end of the first side plate in a direction opposite to the direction in which the first side plate faces the second side plate. The second support plate extends from the upper end of the second side plate in a direction opposite to the direction in which the second side plate faces the first side plate. When the fixing member is stored in the storage case, the first support plate and the second support plate are in contact with the inner wall of the storage case. Since the movement of the fixing member in the horizontal direction is suppressed, even when the power supply device according to the present invention receives a strong impact, the arrangement of the secondary battery in the waterproof case is maintained.

1 is an external perspective view of a power supply device according to an embodiment of the present invention. It is an external appearance perspective view at the time of use of the power supply device shown in FIG. It is a top view of the power supply device shown in FIG. It is sectional drawing of the power supply device shown in FIG. It is a top view of the fixing member shown in FIG. It is sectional drawing of the fixing member shown in FIG. It is sectional drawing of the power supply device shown in FIG. It is sectional drawing of the modification of the power supply device which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

{Appearance of power supply 1}
FIG. 1 is an external perspective view of a power supply device 1 according to the embodiment. As shown in FIG. 1, in the power supply device 1, a battery, an inverter, and the like are housed in a waterproof case 10.

  The waterproof case 10 is a plastic case and includes a storage case 11 and a lid 12. The storage case 11 has a space for storing a battery, an inverter, and the like. By closing the lid 12 so as to block the opening of the storage case 11, the waterproof case 10 can prevent water from entering inside.

  In the waterproof case 10, wheels may be attached to the bottom outside the storage case 11, and an extendable handle may be attached to the side surface 11 a of the storage case 11. Thereby, the user can carry the power supply device 1 easily.

  The waterproof case 10 conforms to a predetermined protection standard, and can prevent foreign matter from entering the inside when the lid 12 is closed. The waterproof case 10 satisfies a standard called “IP-67” defined by IEC (International Electrotechnical Commission) and JIS (Japanese Industrial Standards). IP-67 is a standard in which dust does not enter the interior, and stored items are not adversely affected even when immersed in water at a predetermined pressure and time.

  FIG. 2 is an external perspective view of the power supply device 1 in use. In FIG. 2, the display of the lid 12 is omitted. Although not shown in FIGS. 1 and 2, the lid 12 is attached to the storage case 11 by a hinge and can be opened and closed with respect to the storage case 11. When using the power supply device 1, the user opens the lid 12 and plugs the power cord of an electric device such as a light into the outlet 41 of the inverter 4. Thereby, the user can use the electric device connected to the outlet 41.

  The power supply device 1 is stored in a warehouse or the like with the lid 12 closed. Since the waterproof case 10 satisfies the IP-67 standard, the battery, the inverter, and the like housed in the waterproof case 10 are not affected by flooding. Therefore, the user can use the power supply device 1 safely even after the power supply device 1 is submerged.

  Further, as will be described later, the battery, the inverter, and the like are fixed so as not to move in the waterproof case 10 without impairing the waterproof property of the waterproof case 10. Therefore, even if the power supply device 1 is laid down or dropped, the arrangement of the battery, the inverter and the like does not change inside the power supply device 1. In the power supply device 1, it is possible to prevent the electrical wiring that connects the stored devices from being cut, or the battery from leaking. Therefore, even after the power supply device 1 receives a strong impact, the user can use the power supply device 1 safely.

{Internal configuration of power supply 1}
FIG. 3 is a top view of the power supply device 1 shown in FIG. In FIG. 3, the display of the lid 12 is omitted. 4 is a cross-sectional view taken along line AA of the power supply device 1 shown in FIG. In FIG. 4, the AA cross section of the power supply device 1 when the cover 12 is closed is shown. Hereinafter, the internal configuration of the power supply device 1 will be described in detail with reference to FIGS. 3 and 4.

  In addition to the waterproof case 10, the power supply device 1 includes a fixing member 2, a battery 3, an inverter 4, a converter 5, a charge / discharge controller 6, a ventilation fan 7, seismic isolation rubbers 8 and 8, and a restraining member. 31 and 31 are provided. In FIG. 3, the display of the electrical wiring connected between the battery 3, the inverter 4, the converter 5, the charge / discharge controller 6, and the ventilation fan 7 is omitted.

  The fixing member 2 fixes the battery 3 so that the battery 3 does not move in the storage case 11. In addition to the battery 3, the inverter 4, the converter 5, the charge / discharge controller 6, and the ventilation fan 7 are fixed to the fixing member 2.

  The battery 3 is a secondary battery such as a lithium ion battery or a silicon battery. Note that the power supply device 1 may include a plurality of batteries 3.

  The inverter 4 is connected to the battery 3 and converts the DC power charged in the battery 3 into AC power (100 V) used as a household power source. The voltage of the DC power supplied by the battery 3 varies depending on the charge amount of the battery 3. The electric device connected to the outlet 41 of the inverter 4 can operate by receiving the supply of AC power generated by the inverter 4.

  The converter 5 is connected to the AC input plug P1 and the battery 3, and operates when the battery 3 is charged using a household power source. Specifically, converter 5 converts AC power (100 V) input from AC input plug P <b> 1 into DC power according to the specifications of battery 3. In addition, when the power supply device 1 includes a plurality of batteries 3, the voltage of the DC power generated by the converter changes according to the number of the batteries 3. The battery 3 charges the DC power generated by the converter 5.

  The charge / discharge controller 6 operates when charging the battery 3 using DC power (17.5 V) supplied from a solar cell panel (not shown). That is, when the power cord of the solar cell panel is inserted into the DC input plug P2, DC power (17.5V) is supplied from the solar cell panel to the power supply device 1. The charge / discharge controller 6 converts the voltage of the DC power (17.5 V) supplied from the solar cell panel, and charges the battery 3 with the DC power converted in voltage. Further, the charge / discharge controller 6 supplies the electric power charged in the battery 3 to the ventilation fan 7 when the inverter 4 or the converter 5 operates. Specifically, the charge / discharge controller 6 converts DC power charged in the battery 3 into power suitable for the operation of the ventilation fan 7 and supplies the converted power to the ventilation fan 7.

  The ventilation fan 7 is used for cooling the battery 3, the inverter 4 and the converter 5 stored in the storage case 11. When the battery 3 is charged, the temperature of the battery 3 and the converter 5 rises. When the battery 3 is discharged, the temperature of the battery 3 and the inverter 4 rises. When the air inside the storage case 11 is replaced by the ventilation fan 7, the battery 3, the inverter 4 and the converter 5 are cooled. As a result, malfunctions of the battery 3, the inverter 4, and the converter 5 can be prevented.

  The seismic isolation rubbers 8 are placed on the bottom surface 11 b of the storage case 11. The fixing member 2 is placed on the seismic isolation rubbers 8 and 8 when stored in the waterproof case 10. The seismic isolation rubbers 8, 8 regulate the horizontal movement of the bottom plate 22 of the fixing member 2.

  On the back side of the lid 12, restraining members 31, 31 are provided. When the lid 12 is closed, the restraining members 31 and 31 are in contact with the upper surface of the top plate 20 and restrain the top plate 20 from above. Thereby, when the power supply device 1 is stored (when the lid 12 is closed), the movement of the fixing member 2 in the vertical direction can be restricted. The restraining member 31 is made of a material that can absorb impact, such as polystyrene foam or sponge. The restraining member 31 is fixed to the back surface of the lid 12 with an adhesive or the like so as not to impair the waterproof property of the waterproof case 10.

{Configuration of fixing member 2}
FIG. 5 is a top view of the fixing member 2. 6 is a cross-sectional view of the fixing member 2 shown in FIG. Hereinafter, the configuration of the fixing member 2 will be described in detail with reference to FIGS. 5 and 6. The fixing member 2 includes a top plate 20, a battery holding member 21, and ribs 27 and 28.

  First, the battery holding member 21 will be described. The battery holding member 21 has a substantially U shape, and includes a bottom plate 22, side plates 23 and 24, and attachment plates 25 and 26. The battery holding member 21 can be formed by bending a single metal plate (stainless steel plate, aluminum plate, etc.).

  The bottom plate 22 is disposed to face the bottom surface 11b inside the storage case 11 (see FIG. 4). The side plate 23 extends vertically upward from the end 22 a of the bottom plate 22. The side plate 24 extends vertically upward from the end 22 b of the bottom plate 22. The end 22 b is located on the opposite side of the end 22 a of the bottom plate 22. The side plates 23 and 24 oppose each other.

  The mounting plates 25 and 26 face the bottom surface 11b when the fixing member 2 is stored in the waterproof case 10 (see FIG. 4). The attachment plate 25 is formed by being bent from the upper end 23 a of the side plate 23 in the direction indicated by the arrow E. The attachment plate 26 is formed by being bent from the upper end 24 a of the side plate 24 in the direction indicated by the arrow F.

  Next, the top plate 20 will be described. The top plate 20 is a single metal plate and is placed on the mounting plates 25 and 26. The size of the top plate 20 is created in accordance with the size of the opening 110 (see FIG. 3) of the storage case 11. The top plate 20 is fixed to the mounting plates 25 and 26 with bolts and nuts.

  The top plate 20 includes support portions 201 and 202. The support portions 201 and 202 come into contact with the inner walls 11c and 11d (see FIG. 4) of the storage case 11 through the protective member 203 so that the fixing member 2 does not move in the directions indicated by the arrows E and F. The fixing member 2 is supported. The support portion 201 faces the bottom surface 11 b and extends in the direction indicated by the arrow E from the upper end 23 a of the side plate 23. An arrow E indicates a direction opposite to the direction in which the side plate 23 faces the side plate 24. The support portion 202 faces the bottom surface 11 b and extends from the upper end 24 a of the side plate 24 in the direction indicated by the arrow F. An arrow F indicates a direction opposite to the direction in which the side plate 24 faces the side plate 23.

  As shown in FIG. 6, the protection member 203 is attached so as to surround the periphery of the top plate 20. In FIG. 6, the size of the protective member 203 is exaggerated. In FIG. 4, the protection member 203 is not shown. The protective member 203 is made of a material that can absorb an impact, such as rubber.

  As shown in FIG. 5, the top plate 20 is formed with through holes 20 b to 20 f that penetrate the top plate 20 in the vertical direction. The blower fan 7 is fitted into the through hole 20b. As a result, the air inside the storage case 11 is forcibly discharged out of the storage case 11 through the through hole 20b. The through hole 20 c is used for fitting the charge / discharge controller 6 into the top plate 20. The through hole 20 d is formed to expose the outlet 41 provided on the upper surface of the inverter 4. An AC input plug P1 is fitted into the through hole 20e. A DC input plug P2 is fitted into the through hole 20f.

  The ribs 27 and 28 are right triangular triangular metal plates. The ribs 27 and 28 prevent the shape of the fixing member 2 from being distorted when the power supply device 1 receives a strong impact. Two sides sandwiching the right angle of the rib 27 are fixed to the side plate 23 and the mounting plate 25. Two sides sandwiching the right angle of the rib 28 are fixed to the side plate 24 and the mounting plate 26.

{Storing the fixing member 2}
7 is a BB cross-sectional view of the power supply device 1 shown in FIG. In FIG. 7, the BB cross section of the power supply device 1 when the cover 12 is closed is shown. Hereinafter, storage of the fixing member 2 will be described with reference to FIGS. 4 and 7.

  The battery 3 is fixed to the upper surface of the bottom plate 22. The inverter 4 is fixed to the inner surface of the side plate 23. The upper part of the inverter 4 is fitted into the through hole 20d. Converter 5 is fixed to the inner surface of side plate 24. The charge / discharge controller 6 is fixed to the top plate 20 after being fitted into the through hole 20c. The blower fan 7 is fixed to the top plate 20 after being fitted into the through hole 20b. The fixing method of the battery 3, the inverter 4, the converter 5, the charge / discharge controller 6, and the blower fan 7 is not particularly limited.

  An inverter 4 is connected to the battery 3. The converter 5 is connected to the battery 3 and the AC power plug P1. The charge / discharge controller 6 is connected to the battery 3, the DC power plug P <b> 2, and the blower fan 7.

  The seismic isolation rubbers 8 are placed on the bottom surface 11 b of the storage case 11. The fixing member 2 to which each device is fixed is stored in the storage case 11 by being placed on the seismic isolation rubbers 8 and 8. Further, the space between the side plate 23 and the inner wall 11c is filled with an impact absorbing member such as sponge or polystyrene foam. The same applies to the space between the side plate 24 and the inner wall 11d. When the user does not use the power supply device 1, the user stores the power supply device 1 in a warehouse or the like after closing the lid 12.

  As described above, the battery 3 inverter 4, the converter 5, the charge / discharge controller 6 and the blower fan 7 are stored in the storage case 11 after being fixed to the fixing member 2. As will be described later, since the movement of the fixing member 2 in the horizontal direction and the vertical direction is suppressed, the fixing member 2 is not fixed to the storage case 2. Since the battery 3 and the like are fixed in the waterproof case 10 without processing the waterproof case 10, the waterproof performance of the waterproof case 10 is not impaired.

{Protection of stored equipment}
Hereinafter, the reason why the device stored in the waterproof case 10 is protected and the user can use the power supply 1 safely even when the power supply 1 is flooded or dropped will be described.

  The waterproof case 10 satisfies the IP-67 standard as described above. When the power supply device 1 with the lid 12 closed is submerged, water does not enter the waterproof case 10. Therefore, the user can use the power supply device 1 safely even after the power supply device 1 is submerged.

  Even when the power supply device 1 receives a strong impact due to dropping or the like, the internal structure of the power supply device 1 is maintained. Hereinafter, the reason why the internal structure of the power supply device 1 is maintained will be described.

  First, a case where a horizontal impact is applied to the power supply device 1 will be described. The horizontal direction is a direction in which the top plate 20 is arranged in FIGS. 4 and 7. As shown in FIGS. 4 and 7, since the inner walls 11 c to 11 f of the storage case 11 are inclined, the opening 110 of the storage case 11 is wider than the bottom surface 11 b of the storage case 11. Since the top plate 20 is created according to the size of the opening 110, the top plate 20 is fitted into the opening 110 when the fixing member 2 is stored in the storage case 11. The top plate 20 contacts the inner walls 11c to 11f via the protection member 203. As a result, even if a strong impact in the horizontal direction is applied to the power supply device 1, the horizontal movement of the top plate 20 is suppressed.

  The movement of the bottom plate 22 is suppressed by the seismic isolation rubbers 8 and 8. When it is assumed that the power supply device 1 does not include the seismic isolation rubbers 8 and 8, even if the movement of the top plate 20 is suppressed, the bottom plate 22 may move and the shape of the fixing member 2 may be distorted. Actually, since the bottom plate 22 is placed on the seismic isolation rubbers 8 and 8, the horizontal movement of the bottom plate 22 is suppressed by the seismic isolation rubbers 8 and 8. Even if the bottom plate 22 moves, the bottom plate 22 can return to the original position by the restoring force of the seismic isolation rubbers 8 and 8.

  Since the ribs 27 and 28 are attached to the battery holding member 21, distortion of the battery holding member 21 that occurs with the movement of the bottom plate 22 can also be suppressed.

  Thus, even if the power supply device 1 receives a strong impact in the horizontal direction, the movement of the fixing member 2 is restricted. Moreover, since the distortion which arises in the fixing member 2 is suppressed, it can prevent that the apparatus fixed to the fixing member 2 falls.

  Next, a case where the power supply device 1 receives a vertical impact will be described. When the lid 12 is closed, the restraining members 31, 31 attached to the back surface of the lid 12 come into contact with the upper surface of the top plate 20. Therefore, when a strong impact in the vertical direction is applied to the power supply device 1, the upward movement of the fixing member 2 is restricted by the restraining members 31 and 31. The downward movement of the fixing member 2 is regulated by the seismic isolation rubber 8. As described above, since the fixing member 2 is restricted from moving in the vertical direction, the arrangement of the devices stored in the prevention case 10 is maintained.

  Thus, even if the power supply device 1 receives a strong impact, the arrangement of the accommodated devices is maintained. Since the electric wiring inside the power supply device 1 is not cut off by the movement of the battery 3 or the like, the user can safely use the power supply device 1 even after a strong impact is applied to the power supply device 1.

  As described above, the power supply device 1 houses the fixing member 2 to which the battery 3, the inverter 4, the converter 5, the charge / discharge controller 6 and the blower fan 7 are fixed in the waterproof case 10. Since the top plate 20 and the seismic isolation rubber 8 suppress the horizontal movement of the fixing member 2, and the seismic isolation rubber 8 and the suppression member 31 suppress the vertical movement of the fixing member 2, The movement of the fixing member 2 is restricted. Even if the power supply device 1 receives a strong impact, the internal configuration of the power supply device 1 is maintained, so that the user can use the power supply device 1 safely.

  In the said embodiment, although the example in which the ventilation fan 7 was engage | inserted by the through-hole 20a was demonstrated, it is not restricted to this. The power supply device 1 may not include the blower fan 7. Even in this case, since the air inside the power supply device 1 can flow out through the through hole 20a, the battery 3 and the like can be cooled.

  In the said embodiment, although the top plate 20 demonstrated the example which contacts the inner walls 11c-11f of the storage case 11, it is not restricted to this. For example, in the fixing member 2, the attachment plates 25 and 26 may be in contact with the inner walls 11c and 11d. In this case, the fixing member 2 may not include the top plate 20. The attachment plates 25 and 26 can suppress the fixing member 2 from moving in the directions indicated by the arrows E and F.

  In the said embodiment, although the suppression members 31 and 31 demonstrated the example which is a raw material which can absorb impacts, such as a polystyrene foam and sponge, it is not restricted to this. For example, the suppression members 31 and 31 may be members obtained by bending a metal plate into a bellows shape as shown in FIG. In this case, the end portions 31 a and 31 a of the suppressing member 31 are fixed to the back surface of the lid 12. When the lid 12 is closed, the nodes 31b and 31b of the restraining member 31 are in contact with the upper surface of the top plate 20, so that the vertical movement of the fixing member 2 can be restrained. Although FIG. 8 shows an example in which the restraining members 31 and 31 are arranged so that the nodes 31b and 31b are parallel to the side plates 23 and 24, the direction in which the restraining members 31 and 31 are arranged is in any direction. But you can.

  Although the said embodiment demonstrated the example in which the one fixing member 2 is accommodated in the storage case 11, it is not restricted to this. When the power supply device 1 includes a plurality of batteries 3, the plurality of fixing members 2 may be stored in the storage case 11. In this case, the number of batteries attached to one fixing member 2 may be one, or two or more.

DESCRIPTION OF SYMBOLS 1 Power supply device 2 Fixing member 3 Battery 4 Inverter 5 Converter 6 Charge / discharge controller 7 Blower fan 10 Waterproof case 11 Storage case 12 Lid 20 Top plate 21 Battery storage member 22 Bottom plate 23, 24 Side plate 25, 26 Attachment plate 27, 28 Rib 31 Suppression member 203 Protective member

Claims (6)

A secondary battery;
A fixing member to which the secondary battery is fixed;
A waterproof case that has a lid and a storage case that stores the fixing member, and the lid covers a predetermined waterproof standard by closing an opening of the storage case;
With
The fixing member is
A bottom plate to which the secondary battery is attached;
A first side plate extending upward from the bottom plate;
A second side plate extending upward from the bottom plate and facing the first side plate;
A first support plate extending from the upper end of the first side plate in a direction opposite to the direction in which the first side plate faces the second side plate;
A second support plate extending from the upper end of the second side plate in a direction opposite to the direction in which the second side plate faces the first side plate;
With
When the fixing member is stored in the storage case, the bottom plate faces the bottom surface inside the storage case, and the first support plate and the second support plate contact the inner wall of the storage case. Power supply. The power supply device according to claim 1,
The first support plate and the second support plate are integrally formed top plates,
The top plate is a power supply device mounted on upper ends of the first side plate and the second side plate. The power supply device according to claim 1 or 2, further comprising:
A deterrent member attached to the back surface of the lid and contacting the top surface of the top plate when the lid closes the opening of the storage case;
A power supply device comprising: The power supply device according to claim 2 or 3, further comprising:
Comprising an impact absorbing member provided at the periphery of the top plate;
A power supply device in which the shock absorbing member contacts an inner wall of the storage case when the fixing member is stored in the storage case. The power supply device according to claim 2, further comprising:
A power supply device in which a hole penetrating the top plate in the vertical direction is formed. The power supply device according to any one of claims 1 to 5, further comprising:
A restorative member placed on the inner bottom surface of the storage case and having a restoring force in a direction parallel to the inner bottom surface;
With
The power supply device in which the bottom plate is placed on the recoverable member when the fixing member is stored in the storage case.

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